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- W3208656044 endingPage "72" @default.
- W3208656044 startingPage "72" @default.
- W3208656044 abstract "The connection between the nature of a protoplanetary disk and that of a debris disk is not well understood. Dust evolution, planet formation, and disk dissipation likely play a role in the processes involved. We aim to reconcile both manifestations of dusty circumstellar disks through a study of optically thin Class III disks and how they correlate to younger and older disks. In this work, we collect literature and Atacama Large Millimeter/submillimeter Array archival millimeter fluxes for 85 disks (8%) of all Class III disks across nearby star-forming regions. We derive millimeter-dust masses Mdust and compare these with Class II and debris disk samples in the context of excess infrared luminosity, accretion rate, and age. The mean Mdust of Class III disks is 0.29 ± 0.19 M⊕. We propose a new evolutionary scenario wherein radial drift is very efficient for nonstructured disks during the Class II phase resulting in a rapid Mdust decrease. In addition, we find possible evidence for long infrared protoplanetary disk timescales, ∼8 Myr, consistent with overall slow disk evolution. In structured disks, the presence of dust traps allows for the formation of planetesimal belts at large radii, such as those observed in debris disks. We propose therefore that the planetesimal belts in debris disks are the result of dust traps in structured disks, whereas protoplanetary disks without dust traps decrease in dust mass through radial drift and are therefore undetectable as debris disks after the gas dissipation. These results provide a hypothesis for a novel view of disk evolution." @default.
- W3208656044 created "2021-11-08" @default.
- W3208656044 creator A5000047338 @default.
- W3208656044 creator A5013217868 @default.
- W3208656044 creator A5033663629 @default.
- W3208656044 date "2021-11-01" @default.
- W3208656044 modified "2023-10-14" @default.
- W3208656044 title "Bridging the Gap between Protoplanetary and Debris Disks: Separate Evolution of Millimeter and Micrometer-sized Dust" @default.
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